You can use email and password in the seed data or create it yourself.
For example, I have a user with email "admin@example.com" and password "123456".
curl -v --data "user[email]=admin@example.com&user[password]=123456" http://localhost:3000/api/v1/auth
Use the token value for later requests
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You can use a location id from the seed data or create it yourself.
For example, I have a location with id 1.
curl -v -H "Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOjEsImV4cCI6MTY0MDg3NTI5MX0.bCeq-ow4O2k-sq36hrRN0WH7QuxAtSWMP2xfzycrcsI" http://localhost:3000/api/v1/locations/1.json