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

Pass "Token 4cc658f0c208df76dedfa1587e9fffb5f27e4576" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token 4cc658f0c208df76dedfa1587e9fffb5f27e4576'