# ironmindx/authentication_backend architecture

> Architecture diagram of the GitHub repository ironmindx/authentication_backend, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-11). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/ironmindx/authentication_backend
- Repository: https://github.com/ironmindx/authentication_backend

## Overview

This is a FastAPI authentication service. Clients call the versioned auth and user routes; dependency wiring supplies request-scoped services and repositories, and authentication logic performs registration, login, refresh/rotation, logout, and password changes. Protected user routes validate access tokens and enforce roles before serving account operations. Repositories persist users and refresh-token state through the database session. Application middleware and exception handlers provide cross-cutting request controls and HTTP error translation. The README is empty, so capabilities and links here rely on the supplied source index and excerpts; unsampled route and middleware behavior is not inferred.

Main entry points: [`auth_service/app/dependencies/services.py`](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/dependencies/services.py) (Service Wiring), [`auth_service/app/main.py`](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/main.py) (Application Entry), [`auth_service/app/services/auth_service.py`](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/services/auth_service.py) (Auth Service), [`auth_service/app/repositories/user_repository.py`](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/repositories/user_repository.py) (User Repository)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_http["HTTP API"]
  node_auth_routes["Auth Routes<br/>[auth.py]"]
  node_user_routes["User Routes<br/>[users.py]"]
  node_api_router["Version Router<br/>[router.py]"]
  node_auth_schemas["Auth Schemas<br/>[auth.py]"]
  node_user_schemas["User Schemas<br/>[user.py]"]
end

subgraph group_logic["Identity Logic"]
  node_auth_dependencies["Auth Validation<br/>[auth.py]"]
  node_service_wiring["Service Wiring<br/>[services.py]"]
  node_auth_service["Auth Service<br/>[auth_service.py]"]
  node_user_service["User Service<br/>[user_service.py]"]
  node_security["JWT and Passwords<br/>[security.py]"]
  node_domain_errors["Domain Errors<br/>[custom.py]"]
end

subgraph group_persistence["Persistence"]
  node_user_repo["User Repository<br/>[user_repository.py]"]
  node_token_repo["Token Repository"]
  node_user_model["User Model<br/>[user.py]"]
  node_refresh_model["Refresh Token Model<br/>[refresh_token.py]"]
  node_db_session["DB Session<br/>[session.py]"]
  node_database[("Database Engine<br/>[database.py]")]
end

subgraph group_runtime["Runtime Controls"]
  node_app_entry["Application Entry<br/>[main.py]"]
  node_middleware["Request Middleware<br/>[rate_limit.py]"]
  node_logging_middleware["Logging Middleware<br/>[logging.py]"]
  node_security_headers["Security Headers"]
  node_error_handlers["Exception Handlers<br/>[handlers.py]"]
  node_config["Runtime Settings<br/>[config.py]"]
end

node_client(("API Client"))

node_client -->|"sends requests"| node_app_entry
node_app_entry -->|"mounts routes"| node_api_router
node_api_router -->|"routes to"| node_auth_routes
node_api_router -->|"routes to"| node_user_routes
node_auth_routes -->|"requests dependencies"| node_service_wiring
node_user_routes -->|"requests dependencies"| node_service_wiring
node_auth_routes -->|"validates and returns"| node_auth_schemas
node_user_routes -->|"validates and returns"| node_user_schemas
node_auth_routes -->|"uses protection"| node_auth_dependencies
node_user_routes -->|"uses protection"| node_auth_dependencies
node_service_wiring -->|"gets session"| node_db_session
node_service_wiring -->|"constructs"| node_user_repo
node_service_wiring -->|"constructs"| node_token_repo
node_service_wiring -->|"constructs"| node_auth_service
node_service_wiring -->|"constructs"| node_user_service
node_auth_dependencies -->|"decodes token"| node_security
node_auth_dependencies -->|"loads user"| node_user_repo
node_auth_service -->|"reads and updates"| node_user_repo
node_auth_service -->|"issues and revokes"| node_token_repo
node_auth_service -->|"hashes and signs"| node_security
node_auth_service -->|"raises"| node_domain_errors
node_user_service -->|"accesses users"| node_user_repo
node_user_service -->|"raises"| node_domain_errors
node_user_repo -->|"queries"| node_user_model
node_token_repo -->|"queries and updates"| node_refresh_model
node_db_session -->|"uses engine"| node_database
node_database -->|"reads settings"| node_config
node_app_entry -->|"installs"| node_middleware
node_app_entry -->|"installs"| node_logging_middleware
node_app_entry -->|"installs"| node_security_headers
node_app_entry -->|"registers"| node_error_handlers
node_middleware -->|"reads limits"| node_config
node_error_handlers -->|"translates"| node_domain_errors

click node_auth_routes "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/api/v1/auth.py"
click node_user_routes "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/api/v1/users.py"
click node_api_router "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/api/v1/router.py"
click node_auth_schemas "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/schemas/auth.py"
click node_user_schemas "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/schemas/user.py"
click node_auth_dependencies "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/dependencies/auth.py"
click node_service_wiring "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/dependencies/services.py"
click node_auth_service "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/services/auth_service.py"
click node_user_service "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/services/user_service.py"
click node_security "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/core/security.py"
click node_domain_errors "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/exceptions/custom.py"
click node_user_repo "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/repositories/user_repository.py"
click node_token_repo "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/repositories/token_repository.py"
click node_user_model "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/models/user.py"
click node_refresh_model "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/models/refresh_token.py"
click node_db_session "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/db/session.py"
click node_database "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/db/database.py"
click node_app_entry "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/main.py"
click node_middleware "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/middleware/rate_limit.py"
click node_logging_middleware "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/middleware/logging.py"
click node_security_headers "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/middleware/security_headers.py"
click node_error_handlers "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/exceptions/handlers.py"
click node_config "https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/core/config.py"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_auth_routes,node_user_routes,node_api_router,node_auth_schemas,node_user_schemas,node_client toneBlue
class node_auth_dependencies,node_service_wiring,node_auth_service,node_user_service,node_security,node_domain_errors toneAmber
class node_user_repo,node_token_repo,node_user_model,node_refresh_model,node_db_session,node_database toneMint
class node_app_entry,node_middleware,node_logging_middleware,node_security_headers,node_error_handlers,node_config toneRose
```

## Components

### HTTP API

- [Auth Routes](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/api/v1/auth.py): `auth_service/app/api/v1/auth.py`
- [User Routes](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/api/v1/users.py): `auth_service/app/api/v1/users.py`
- [Version Router](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/api/v1/router.py): `auth_service/app/api/v1/router.py`
- [Auth Schemas](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/schemas/auth.py): `auth_service/app/schemas/auth.py`
- [User Schemas](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/schemas/user.py): `auth_service/app/schemas/user.py`

### Identity Logic

- [Auth Validation](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/dependencies/auth.py): `auth_service/app/dependencies/auth.py`
- [Service Wiring](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/dependencies/services.py): `auth_service/app/dependencies/services.py`
- [Auth Service](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/services/auth_service.py): `auth_service/app/services/auth_service.py`
- [User Service](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/services/user_service.py): `auth_service/app/services/user_service.py`
- [JWT and Passwords](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/core/security.py): `auth_service/app/core/security.py`
- [Domain Errors](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/exceptions/custom.py): `auth_service/app/exceptions/custom.py`

### Persistence

- [User Repository](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/repositories/user_repository.py): `auth_service/app/repositories/user_repository.py`
- [Token Repository](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/repositories/token_repository.py): `auth_service/app/repositories/token_repository.py`
- [User Model](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/models/user.py): `auth_service/app/models/user.py`
- [Refresh Token Model](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/models/refresh_token.py): `auth_service/app/models/refresh_token.py`
- [DB Session](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/db/session.py): `auth_service/app/db/session.py`
- [Database Engine](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/db/database.py): `auth_service/app/db/database.py`

### Runtime Controls

- [Application Entry](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/main.py): `auth_service/app/main.py`
- [Request Middleware](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/middleware/rate_limit.py): `auth_service/app/middleware/rate_limit.py`
- [Logging Middleware](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/middleware/logging.py): `auth_service/app/middleware/logging.py`
- [Security Headers](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/middleware/security_headers.py): `auth_service/app/middleware/security_headers.py`
- [Exception Handlers](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/exceptions/handlers.py): `auth_service/app/exceptions/handlers.py`
- [Runtime Settings](https://github.com/ironmindx/authentication_backend/blob/main/auth_service/app/core/config.py): `auth_service/app/core/config.py`

### Other components

- **API Client**

## Connections

- API Client → Application Entry: sends requests
- Application Entry → Version Router: mounts routes (evidence: `auth_service/app/main.py`)
- Version Router → Auth Routes: routes to (evidence: `auth_service/app/api/v1/router.py`)
- Version Router → User Routes: routes to (evidence: `auth_service/app/api/v1/router.py`)
- Auth Routes → Service Wiring: requests dependencies (evidence: `auth_service/app/api/v1/auth.py`)
- User Routes → Service Wiring: requests dependencies (evidence: `auth_service/app/api/v1/users.py`)
- Auth Routes → Auth Schemas: validates and returns (evidence: `auth_service/app/api/v1/auth.py`)
- User Routes → User Schemas: validates and returns (evidence: `auth_service/app/api/v1/users.py`)
- Auth Routes → Auth Validation: uses protection (evidence: `auth_service/app/api/v1/auth.py`)
- User Routes → Auth Validation: uses protection (evidence: `auth_service/app/api/v1/users.py`)
- Service Wiring → DB Session: gets session (evidence: `auth_service/app/dependencies/services.py`)
- Service Wiring → User Repository: constructs (evidence: `auth_service/app/dependencies/services.py`)
- Service Wiring → Token Repository: constructs (evidence: `auth_service/app/dependencies/services.py`)
- Service Wiring → Auth Service: constructs (evidence: `auth_service/app/dependencies/services.py`)
- Service Wiring → User Service: constructs (evidence: `auth_service/app/dependencies/services.py`)
- Auth Validation → JWT and Passwords: decodes token (evidence: `auth_service/app/dependencies/auth.py`)
- Auth Validation → User Repository: loads user (evidence: `auth_service/app/dependencies/auth.py`)
- Auth Service → User Repository: reads and updates (evidence: `auth_service/app/services/auth_service.py`)
- Auth Service → Token Repository: issues and revokes (evidence: `auth_service/app/services/auth_service.py`)
- Auth Service → JWT and Passwords: hashes and signs (evidence: `auth_service/app/services/auth_service.py`)
- Auth Service → Domain Errors: raises (evidence: `auth_service/app/services/auth_service.py`)
- User Service → User Repository: accesses users (evidence: `auth_service/app/services/user_service.py`)
- User Service → Domain Errors: raises (evidence: `auth_service/app/services/user_service.py`)
- User Repository → User Model: queries (evidence: `auth_service/app/repositories/user_repository.py`)
- Token Repository → Refresh Token Model: queries and updates (evidence: `auth_service/app/repositories/token_repository.py`)
- DB Session → Database Engine: uses engine (evidence: `auth_service/app/db/session.py`)
- Database Engine → Runtime Settings: reads settings (evidence: `auth_service/app/db/database.py`)
- Application Entry → Request Middleware: installs (evidence: `auth_service/app/main.py`)
- Application Entry → Logging Middleware: installs (evidence: `auth_service/app/main.py`)
- Application Entry → Security Headers: installs (evidence: `auth_service/app/main.py`)
- Application Entry → Exception Handlers: registers (evidence: `auth_service/app/main.py`)
- Request Middleware → Runtime Settings: reads limits (evidence: `auth_service/app/middleware/rate_limit.py`)
- Exception Handlers → Domain Errors: translates (evidence: `auth_service/app/exceptions/handlers.py`)