Support for multi-environment configuration

[zuvola]

You can override the Default configuration by using the Cognito.initialize(configuration:) method.

{
    "AppSync": {
        "Default": {
            "ApiUrl": "YOUR-GRAPHQL-ENDPOINT",
            "Region": "us-east-1",
            "ApiKey": "YOUR-API-KEY",
            "AuthMode": "API_KEY"
        },
        "Custom": {
            "ApiUrl": "YOUR-GRAPHQL-ENDPOINT",
            "Region": "us-east-2",
            "ApiKey": "YOUR-API-KEY",
            "AuthMode": "API_KEY"
        }
   }
}

Cognito.initialize(configuration: 'Custom');