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

Pass "Token 78ac68cf74603e07053b05d24e1f3edd29105b82" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token 78ac68cf74603e07053b05d24e1f3edd29105b82'