Complete OAuth flow and store Google Earth Engine credentials.

Authentication: JWT token required Authorization: Any authenticated user Content-Type: application/json

Request Body Schema:

{
  "code": "authorization_code_from_google",
  "state": "state_token_from_initiate_call"
}

Required Fields:

• code: Authorization code received from Google OAuth callback
• state: State token from the initiate call for CSRF protection

Response Schema:

{
  "message": "GEE OAuth credentials saved successfully"
}

Error Responses:

• 400 Bad Request: Missing code/state, invalid code, or JSON parsing error
• 401 Unauthorized: JWT token required or invalid
• 404 Not Found: User not found
• 500 Internal Server Error: Failed to exchange code or save credentials