Delete current user's Google Earth Engine credentials.

Authentication: JWT token required Authorization: Any authenticated user

Response Schema:

{
  "message": "GEE credentials deleted successfully"
}

What Gets Deleted:

• OAuth access and refresh tokens (if using OAuth)
• Service account key (if using service account)
• Credentials type and creation timestamp
• All encrypted credential data is permanently removed

Error Responses:

• 401 Unauthorized: JWT token required or invalid
• 404 Not Found: User not found or no GEE credentials exist
• 500 Internal Server Error: Failed to delete credentials