I tried using access token method but got still getting the same error. PS. the token was generated by running the code in graphiql UI of Datahub - Curl Request -

curl -v --location --request POST '<domain endpoint>/api/graphql' \
--header 'Authorization: Bearer <my-access-token>' \
--header 'Content-Type: application/json' \
--data-raw '{ "query": "mutation createDomain { createDomain(input: { name: \"lol\", description: \"nothing\" }) }", "variables":{}}'