Function refresh_token 

pub async fn refresh_token(
    __arg0: State<DB>,
    __arg1: Json<RefreshTokenRequest>,
) -> (StatusCode, Json<AuthTokenResponse>)

Handles token refresh requests This endpoint allows clients to obtain a new access token using a valid refresh token. It verifies the refresh token, checks its validity in the database, and generates a new access token if everything is valid. The refresh token is not rotated in this implementation, but it can be easily modified to do so if desired.

Arguments

• State(_db) - Shared state containing the database connection (not used but required by Axum)
• Json(payload) - The refresh token request payload containing the refresh token

Returns

• (StatusCode, Json<AuthTokenResponse>) - The HTTP status code and JSON response containing the new access token or an error message

Error

• StatusCode::UNAUTHORIZED - If the refresh token is invalid, expired, of the wrong type, or not found in the database
• StatusCode::INTERNAL_SERVER_ERROR - If there is an error generating the new access token

Example

let payload = RefreshTokenRequest {
    refresh_token: "valid_refresh_token".to_string(),
};