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

Pass "Token 6f0546f7f647631679a221d6a1081004859cd196" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token 6f0546f7f647631679a221d6a1081004859cd196'