Getting authentication error from canvas LMS when trying to sync grades

[bhagwandas]

For grade sync, in our tool, we tried to write line item into Canvas. During this, a call is made for getting token at following endpoint of canvas lms: /login/oauth2/token by pylit1.3 lib

with following params:

grant_type=client_credentials
client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer
client_assertion=
scope=https://purl.imsglobal.org/spec/lti-ags/scope/lineitem+https://purl.imsglobal.org/spec/lti-ags/scope/lineitem.readonly+https://purl.imsglobal.org/spec/lti-ags/scope/result.readonly+https://purl.imsglobal.org/spec/lti-ags/scope/score+url

But canvas returns 500 error.

In canvas logs, this is what it shows:

Started POST "/login/oauth2/token" for 10.8.0.46 at 2024-06-25 18:24:31 +0000
Redis (0.456ms) get rails61:_account_lookup5/1 [127.0.0.1:6379]
Redis (0.331ms) get rails61:settings_for_plugin4/sessions [127.0.0.1:6379]
request throttling increment: [0,50.0,1719339871.378653,["client_identifier","session:1840e92e937a64fba82500e8b66a5fcb"],["count",0.
0],["last_touched",null]]
Redis (0.787ms) evalsha - [127.0.0.1:6379]
Processing by OAuth2ProviderController#token as /
Parameters: {"grant_type"=>"client_credentials", "client_assertion_type"=>"urn:ietf:params:oauth:client-assertion-type:jwt-bearer"
, "client_assertion"=>"eyJhbGciOiJSUzI1NiIsImtpZCI6IjF3N3pfcHlTd0NPVlB2cEVwVjRYUEpXemF3QnJwMUF4TThtOWN4UEFhcHciLCJ0eXAiOiJKV1QifQ.eyJpc3MiOiIxMDAwMDAwMDAwMDAxMSIsInN1YiI6IjEwMDAwMDAwMDAwMDExIiwiYXVkIjoiaH
R0cHM6Ly9jYW52YXMubGFiLmNvbXB1d\nGVyL2xvZ2luL29hdXRoMi90b2tlbiIsImlhdCI6MTcxOTMzOTQyMCwiZXhwIjoxNzE5MzM5NDg1LCJqdGkiOiJsdGktc2VydmljZS10b2tlbi01MmNmYjMyYy0zM2QxLTQ2M2EtOTYyYi00NjRhMDEwZGZjYWYifQ.gsFk8y0xr
h22_9tyy83vY-G4ZObd4RT9NCMMEuB5ez\nqiVVvuuijal7hqJ9i-y5kRI6woy20fbCaiq8LBoRIVvvD73Oe2Hb0Q-OPI9JeQAalKvgiR6cR2cJLX41UmargTngLaE2tswbuF9YgBARTGt-85qws1SD2Xw4wDEbMu8BzC2iSJB6op9RnmmCnbE5IxT_tK2r5-IKNOwP4Er-f
12XvZazmn9WYNUU6_yyyFiavV_eNsnVLfUp\nhiVeFRzHP2zubmATlskumXjMwhWvSvV_NGgaRXPDttQP6NQNxJjzi3DFKwy0DS4zqYxXBcsfI3Yia2OkT0QpEdX-Ill1jx-rMFiMuALckhcPQfWYNvzeBfDO6RI01T9EZ4avhewFXEeyCIqeHOvsRzloR_GTw_ENzGwKFAg
Cg-drwcu94shHNvhl_w_Ld34o5vRi3Vp59BVb\nidRiqvS-tIc8OtvU9bW0tRJyhVl-NM7kimHErq9Dm9iPkTEVYnyxQGdVK7tV3OYghgdxw5JTJqLD80LFuCgdriYT9b4YebDXgb7i-bZDq2Q_o2AhCdXOlUaf8e8ZRhsOY5-sb7y93A75ZkNGpEpmi4DY-lZ8D5XIafiHZ
LhGP-xS2JnUUIouA_tz5YNuO51c3g1p_P_Yzf8R\nPNptAe4HIoGWtym6U32Qsd245k5mw", "scope"=>"https://purl.imsglobal.org/spec/lti-ags/scope/lineitem+https://purl.imsglobal.org/spec/lti-ags/scope/lineitem.readonly+ht
tps://purl.imsglobal.org/spec/lti-ags/scope/result.readonly+https://purl.imsglobal.org/spec/lti-ags/scope/score"}
[AUTH] Authlogic Validation Error: You did not provide any details for authentication.
[AUTH] Authlogic Failed Find
[AUTH] initial load: pseud -> , user ->
[AUTH] final user: