Make instructions for server objects easier to copy and paste

from ldap3 import Tls, Server

TLS_CONFIGURATION = Tls(validate=ssl.CERT_REQUIRED)

```

For the CL account, use:

```python

ldap_server_url = "ldaps://ldap2.cl.uni-heidelberg.de"

```

For the Uni ID, use:

ldap_server_url = ...  # Choose one from the table above

```python

ldap_server_url = "ldaps://ad.uni-heidelberg.de"

```

Then, run:

```

server = Server(ldap_server_url, use_ssl=True, tls=TLS_CONFIGURATION)

```