| E001_INTERNAL_CONNECTION_MISSING | Internal connection missing |
| E002_INTERNAL_DATA_ERROR | Internal data error |
| E003_INTERNAL_ERROR | General internal server error |
| E001_AUTH_FAILURE | Authentication failure |
| E002_AUTH_DOMAIN_INVALID | Authentication domain invalid |
| E001_BAD_MISSING_DATA | Missing request payload |
| E002_BAD_USER_NOT_EXISTS | The user you are looking for does not exist |
| E003_BAD_USER_EXISTS | User already exists (error when creating new user) |
| E004_BAD_INVALID_DOMAIN | Invalid domain provided |
| E005_BAD_PASSWORD_INVALID | Incorrect password |
| E006_BAD_DUPLICATE_PHONE | Phone number already exists |
| E007_BAD_DUPLICATE_EMAIL | Email address already exists |
| E008_PARAMS_INVALID | Invalid request parameters |
| E009_BAD_RESOURCE_EXISTS | Resource already exists |
| E010_BAD_RESOURCE_NOT_EXISTS | Resource not found |