[Solved] SyntaxError: EOL while scanning string literal

I have an error with the below code and not sure what is wrong with it?

os.system(f"title {__version__} - Connected as { requests.get(sys_url,headers=s_sys_h()).json(){['username']}})

I get this error:

  File "main.py", line 1
    os.system(f"title {__version__} - Connected as { requests.get(sys_url,headers=s_sys_h()).json(){['username']}})
                                                                                                                  ^
SyntaxError: EOL while scanning string literal

and if you could explain the meaning of this code? is it looking for usernames in a json file?