Changes to POST /v1/applications/:application_id/invitations

added the new optional request property hosted_client_id

added the new optional request property hosted_redirect_uri

added the optional property hosted_client_id to the response with the 201 status

added the optional property hosted_redirect_uri to the response with the 201 status

added the new optional request property onboarding_method

added the required property onboarding_method to the response with the 201 status

endpoint added