trying to configure the NPM with Personal access token for Ping authenticate but resulting it a syntax error with the following commands

code :

npm config set "@example-inc:registry https://gitlab.com/api/v4/packages/npm/"

npm config set --//gitlab.com/api/v4/packages/npm/:_authToken=<xxxx-xxxx_x-xxxxxxxxxxxxxx>

error:The syntax of the command is incorrect.emphasized text