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Error response format

When the server responds with an HTTP 400 (Bad Request) status code, it includes the following parameters with the response:

errorStringA single error code
error_descriptionoptionalStringHuman-readable text providing additional information, used to assist the client developer in understanding the error that occurred. Contains US-ASCII symbols only.

The error code is one of the following:

Error codeDescription
invalid_requestThe request is missing a required parameter.
invalid_clientClient authentication failed (e.g., unknown client, no client authentication included, or unsupported authentication method)
invalid_grantThe provided authorization grant (client secret) is invalid, revoked, or was issued to another client.
unauthorized_clientThe authenticated client is not authorized to use this authorization grant type.
unsupported_grant_typeThe authorization grant type is not supported by the server.
invalid_scopeThe requested scope is invalid, unknown, malformed, or exceeds the scope granted by the resource owner.