How to access the LoRa App Server web-interface?

hi!
how to access the LoRa App Server web-interface?
I’ve already read some information on BBS. I did it according to this:https://www.loraserver.io/guides/debian-ubuntu/
When I use this command
sudo journalctl -f -n 100 -u loraserver
The situation is as follows. I think there may be some problems
[
1月 31 11:04:56 richard-virtual-machine loraserver[6638]: time=“2019-01-31T11:04:56+08:00” level=error msg=“ping database error, will retry in 2s: pq: password authentication failed for user “loraserver””
1月 31 11:04:58 richard-virtual-machine loraserver[6638]: time=“2019-01-31T11:04:58+08:00” level=error msg=“ping database error, will retry in 2s: pq: password authentication failed for user “loraserver””
1月 31 11:05:00 richard-virtual-machine loraserver[6638]: time=“2019-01-31T11:05:00+08:00” level=error msg=“ping database error, will retry in 2s: pq: password authentication failed for user “loraserver””
1月 31 11:05:02 richard-virtual-machine loraserver[6638]: time=“2019-01-31T11:05:02+08:00” level=error msg=“ping database error, will retry in 2s: pq: password authentication failed for user “loraserver””
1月 31 11:05:04 richard-virtual-machine loraserver[6638]: time=“2019-01-31T11:05:04+08:00” level=error msg=“ping database error, will retry in 2s: pq: password authentication failed for user “loraserver””
1月 31 11:05:06 richard-virtual-machine loraserver[6638]: time=“2019-01-31T11:05:06+08:00” level=error msg=“ping database error, will retry in 2s: pq: password authentication failed for user “loraserver””
]

I hope to get your reply.
Thank You!

sorry!
I already know the problem is here:
After installation, modify the configuration file which is located at /etc/lora-app-server/lora-app-server.toml . Given you used the password dbpassword when creating the PostgreSQL database, you want to change the config variable postgresql.dsn into:
postgres://loraserver_as:dbpassword@localhost/loraserver_as?sslmode=disable

There may be other problems. I’ll try to solve them by myself. Let’s see

Please check the forum for previously asked questions. You may find help for your issue in this topic: https://forum.loraserver.io/t/error-will-retry-in-2s-pq-password-authentication-failed-for-user-loraserver/272/42.