ERR: authorization failed for non-admin user

I'm getting "ERR: authorization failed" when executing USE command from CLI

admin user

```
influx -host influx.example.com -username admin -password admin
Connected to http://influx.example.com:8086 version 1.5.4
InfluxDB shell version: v1.7.2
Enter an InfluxQL query
> show databases;
name: databases
name
----
telegraf
_internal
> SHOW USERS
user admin
---- -----
admin true
telegraf false
> SHOW GRANTS FOR telegraf
database privilege
-------- ---------
telegraf ALL PRIVILEGES
> GRANT ALL ON "telegraf" TO "telegraf"
> SHOW GRANTS FOR telegraf
database privilege
-------- ---------
telegraf ALL PRIVILEGES
> exit
```

non-admin user

```
influx -host influx.example.com -username telegraf -password telegraf
Connected to http://influx.example.com:8086 version 1.5.4
InfluxDB shell version: v1.7.2
Enter an InfluxQL query
> use telegraf
WARN: authorization failed
Using database telegraf
> SHOW MEASUREMENTS
ERR: authorization failed
```

Reproduce the reported CLI flow with the admin and non-admin users, starting with USE telegraf and SHOW MEASUREMENTS. Compare the displayed grants with the authorization failure and check the repository's CLI or authentication entry points. Done means a non-admin user with the shown database privileges can use the database and run SHOW MEASUREMENTS, or the limitation is documented.

Written by the indexing model from the issue text.