raise ConnectionError() - Speedport3

Hey Andre,

I stumbled accross your api and I loved it. It basically does everything I want to do, BUT I have a Speedport 3 in place. Whenever I try to run your code it raises a connection error as seen below:

```
Traceback (most recent call last):
File "/Users/USERNAME/Library/CloudStorage/OneDrive-TUI/Skripte/Python Skripte/network.py", line 23, in
devices = asyncio.run(Speedport().devices)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/USERNAME/.pyenv/versions/3.11.6/lib/python3.11/asyncio/runners.py", line 190, in run
return runner.run(main)
^^^^^^^^^^^^^^^^
File "/Users/USERNAME/.pyenv/versions/3.11.6/lib/python3.11/asyncio/runners.py", line 118, in run
return self._loop.run_until_complete(task)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/USERNAME/.pyenv/versions/3.11.6/lib/python3.11/asyncio/base_events.py", line 653, in run_until_complete
return future.result()
^^^^^^^^^^^^^^^
File "/Users/USERNAME/.pyenv/versions/3.11.6/lib/python3.11/site-packages/speedport/speedport.py", line 81, in devices
data = await self.api.get_devices()
^^^^^^^^
File "/Users/USERNAME/.pyenv/versions/3.11.6/lib/python3.11/site-packages/speedport/speedport.py", line 77, in api
raise ConnectionError()
```

Here is why I find this really interesting. When I try to connect to the router via script a (synchronously) the script says
```
Login successful!
/Users/USERNAME/Library/CloudStorage/OneDrive-TUI/Skripte/Python Skripte/network.py:16: RuntimeWarning: coroutine 'Speedport.login' was never awaited
```

in script b (asynchronously) I receive the already posted connection error. Is there more to it that I don't see or is it "just" because of the speedport 3? I have to admit network stuff (specifically web and javascript) are not my strongsuit.

script a
```
from speedport import Speedport

def login_to_router(url, password):
speedport = Speedport(url)

# Login to the router
login_status = speedport.login(password)

if login_status:
print("Login successful!")
else:
print("Login failed!")

url = 'http://192.168.2.1'
password = 'PASSWORD'
login_to_router(url, password)
```

script b
```
from speedport import Speedport
import asyncio

async def login_to_router(url, password):
try:
speedport = Speedport(url)

# Try to login to the router
login_status = await speedport.login(password)

if login_status:
print("Login successful!")
else:
print("Login failed!")
except Exception as e:
print(f"Failed to connect to the router. Error: {e}")

url = 'http://192.168.2.1' # replace with your router's URL
password = 'PASSWORD' # replace with your password
asyncio.run(login_to_router(url, password))
```