Creating a user pool

We will begin by creating a user pool that we intend to use for all of our users. This will be a repeat of the process we went through in Chapter 5, Introducing Amazon Cognito, so we will not be as fastidious in documenting the process, aside from the specifics of the configuration we require to fulfill our use case. Proceed as follows:

1. From the AWS Management Console, go to Amazon Cognito and select the Manage User Pools option.
2. Select Create a user pool. This takes us through to the wizard. We name our pool and select the option to step through the settings, to make the changes we will need to configure this user pool instance as we want. The process is illustrated in the following screenshot:

   Figure 12.2 – Creating a new user pool

3. We will make several adjustments to the Attributes section. If we want our external IdP to be the authoritative source of user information for this user pool, we will need to ensure we include all of the attributes...