* created a "Log" function for type "Connection"
* created a "log" function for type "Provider"
* replace logger calls to Log/log where possible
I also renamed PGSSQL to PGSQL, as this seemed to be a typo
Signed-off-by: Jo Vandeginste <Jo.Vandeginste@kuleuven.be>
This will show the key fingerprint and the associated comment, or
"password" when password was used, during login.
Eg.:
```
message":"User id: 1, logged in with: \"public_key:SHA256:FV3+wlAKGzYy7+J02786fh8N8c06+jga/mdiSOSPT7g:jo@desktop\",
```
or
```
message":"User id: 1, logged in with: \"password\",
...`
Signed-off-by: Jo Vandeginste <Jo.Vandeginste@kuleuven.be>
