Please use JWT authentication if possible. More details in the online documentation.

Pass "Token cac615b7a43255b01ce1878ac561d37ff646d2aa" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token cac615b7a43255b01ce1878ac561d37ff646d2aa'