Authentication Errors

Authentication errors use this response shape:

json

{
  "ok": false,
  "error": "invalid_api_key"
}

Error	Status	Meaning
`invalid_api_key`	401	The key is missing, unknown, expired, revoked, or owned by an inactive developer account.
`redirect_uri_required`	409	The developer account does not have a registered callback URL.
`invalid_state`	400	A valid connection-state value was not provided.
`invalid_project_id`	400	A valid project identifier was not provided.
`project_not_connected`	403	The API key has no active connection to the requested project.
`connection_not_found`	404	The requested active key-to-project connection does not exist.
`invalid_authorization_code`	401	The callback code is missing, unknown, unapproved, or belongs to another API key.
`authorization_denied`	401	The ModuSell user denied the connection.
`authorization_code_used`	409	The one-time authorization code has already completed a connection.
`authorization_code_expired`	410	The connection request expired before code exchange.