Changes to Start a project import provider connection

added the new optional query request parameter callback_url

the response's body type changed from no type to object for status 400

the response's body type changed from no type to object for status 401

the response's body type changed from no type to object for status 500

the response's body type changed from no type to object for status 503

added the optional property code to the response with the 400 status

added the optional property code to the response with the 401 status

added the optional property code to the response with the 500 status

added the optional property code to the response with the 503 status

added the required property error to the response with the 400 status

added the required property error to the response with the 401 status

added the required property error to the response with the 500 status

added the required property error to the response with the 503 status

endpoint added