Before making use of a CONNECTED application, it is a requirement that you are registered with the CONNECT services.
An administrator, typically your IT manager, will register your company email address and will grant you access to all the services and entitlements that you should have access to. In this case, you will need to sign in to CONNECTION Client with your email and a password provided by your administrator. Once signed in, you will have access to your CONNECT services and entitlements.
If you have not been registered, then you will need to register, details of which can be found here.
To find out the administrators assigned to your company or organization, you can check it in the CONNECT Center: https://connect.bentley.com
Information on the CONNECT Center Overview can be found here.