Getting {"error": "invalid_grant" } in Django OAUTH when trying to generate a token using AUTHORIZATION CODE FLOW

I'm trying to access token using authorization code flow. Following documentation at Django OAuth Here's my code that's making the post request:

curl --location --request POST 'http://127.0.0.1:8000/o/token/' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--header 'Cache-Control: no-cache' \
--header 'Accept: application/json' \
--data-urlencode 'client_id=ngta3GGa3jP6Rmv5Tspj97Bk4aiitHgv1EQilCDS' \
--data-urlencode 'client_secret=zLwMyuXg7WCSFwUDYBxFP3QxHh5mF6xM2hBsKyvRbypac5lV7fl2NoFeeDG3afWWxLedA7qtzD2Mvf68qyBra3A4iUXXlDXJO4LvxuZv4UULU6NLWlObpD0ylQSXbwZD' \
--data-urlencode 'code=q4NfBMbyTNbcIQZ4j7SfgMWL898psv' \
--data-urlencode 'redirect_uri=http://localhost:8000/no/callback/' \
--data-urlencode 'code_verifier=b'\''SlJDWEgyRzNYMks0RTVQVDlRVkFaOFdDUkxHV1A3QURMTjNITFdaMTBLU0tWQkkzMUVWVEZFU0k='\''' \
--data-urlencode 'grant_type=authorization_code'

I'm expecting to get an access token when I make the post request, but I'm getting this error: { "error": "invalid_grant" }

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