Changed API as of late May.

[johnolos]

Update May 2018

We have stopped using customerId as a part of the API URL. Instead we require all API requests to include the customerId as a http header. See swagger for more information.
We have rolled back all APIs to start on V1
We have stopped using AccountNumber as part of the URL. Instead we require all Account API requests to include the AccountId as retrieved from HTTP GET /Bank/api/v1/Accounts (see powershell script example)
Update of IdentityServer requires Clients to form-urlencode ClientId and Secret prior to Base64-encoding the Authorization header. This is according to specification in RFC6749. See DotNetCoreSampleApplication (updated to IdentityModel 3.6.1 which does this automatically) and ShellScripts example.