Error Code
When the code is 0, it's normal; when it's a negative number, it's an error.
| Error Code | Reason |
|---|---|
| -1 | Invalid request parameters |
| -2 | Username or email already exists |
| -3 | Username does not exist or incorrect password |
| -4 | User not logged in |
| -5 | Project does not exist or you are not the creator |
| -6 | Project already exists |
| -7 | Project does not exist |
| -8 | User does not have permission |
| -9 | User does not exist |
| -10 | Project must have an administrator |
| -11 | Creator must be an administrator |
| -12 | Account does not have any projects |
| -13 | API does not exist |
| -14 | Duplicate users exist |
| -500 | unknown mistake |