response_type: id_token (required, the tool must use a value of id_token)
redirect_uri:
https://masterplan.com/api/lti/launch
response_mode: form_post (required, tools and platforms must support a value of form_post)
client_id: test_client_id (required, client identifier valid at the Platform)
scope: openid (required, must contain the openid scope value)
state: state-8123fd2d-fbd8-4101-83d2-4aa93d6ff7cc (required, opaque value used to maintain state between the request and the callback)
login_hint: 762822 (required, tools and platforms must support a value of form_post)
lti_message_hint: 77943 (required, a platform opaque identifier identifying the user to login)
prompt: none (optional, The tool should use a value of none. In the future a re-launch flow may support additional values being used here)
nonce: 3957eff2780b4d2dbab0bf05d00bdae91d1aec6016ec11efb8e20a58a9feac02 (optional, string value used to associate a client session with an ID token, and to mitigate replay attacks)