To start using ALPI, you will need to create them as a carrier. To do this, go to Connect Carriers and find ALPI in the list. Select it and click "Create Carrier". 

You will now need to enter the following info provided by ALPI:

• User
• Password
• Account

Once entered, all you have to do is press "Create Carrier" and you are all set and ready to start creating shipping methods with ALPI.

Shipping rates

Once you have connected to your carrier, you can start building your desired shipping rates with each of the services available on the carrier. 
Simply navigate to Connect > Order channels > Select your channel > Add Shipping rate. 

Read more here on how to build shipping rates