Authentication Errors

Below is a description of possible authentication errors that can be returned.

Error	Message	Details
invalid_client	Browser requests to the token endpoint must use Proof Key for Code Exchange	You are trying to authenticate through a client side script such as Javascript. Please use a middleware proxy layer for a Machine to Machine authentication.
invalid_client	Invalid value for 'client_id' parameter.	The Client Id provided is inaccurate. Double check the credentials supplied to you by Benevity.
invalid_client	The client secret supplied for a confidential client is invalid.	The Client Secret provided is inaccurate. Double check the credentials supplied to you by Benevity.
invalid_request	The token request must specify a 'grant_type'. Valid values: [client_credentials]	You did not supply the grant type via query parameter. Example: ?grant_type=client_credentials.
E0000021	Bad request. Accept and/or Content-Type headers likely do not match supported values.	You must supply the Content-Type in the header with a value of application/x-www-form-urlencoded.
x-amzn-ErrorType: UnauthorizedException	Unauthorized	The token you're using has expired. Tokens have a 3600 second (1 hour) lifetime.