The admin UI is located /admin. To login, look for the admin_token field inside /app/data/config.json using the File manager.

Starting with version 1.28, it is safer to generate an admin token using the built-in hash feature.

Otherwise, warnings might be shown in the logs - Please generate a secure Argon2 PHC string by using vaultwarden hash or argon2.

To fix, open a web terminal and run:
/app/code/vaultwarden hash
Generate an Argon2id PHC string using the 'bitwarden' preset:
Password:
Confirm Password: 
ADMIN_TOKEN='$argon2id$v=19$m=65540,t=3,p=4$RCpl3a+FItyn4KBJVAtZ+EyP9+fK0hoRqqo9jEdyRJE$d7UfKfZYsZJad6OIKpzPtO2o2ccLkrHjEi5jXdWWkO0'

Take the above ADMIN_TOKEN and put it in /app/data/config.json in the field admin_token.

Important:

- Remove the single quotes around the argon2id string above.
- The token to login to the admin page is the password you entered above to generate the ADMIN_TOKEN.
- config.json should be edited like below (please be careful about the quoting):
"admin_token": "$argon2id$v=19$m=65540,t=3,p=4$RCpl3a+FItyn4KBJVAtZ+EyP9+fK0hoRqqo9jEdyRJE$d7UfKfZYsZJad6OIKpzPtO2o2ccLkrHjEi5jXdWWkO0"

Restart the app and verify if token actually changed.