docs: update examples

Update the example output in README to match the new JSON produced by
platform-go-middleware/identity.

README.md

@@ -26,29 +26,30 @@ specified type. Any flag set will be inserted instead of a random value.
 All remaining fields will be filled with a suitably random value.
 
 SUBCOMMANDS
-  user       generate a user identity JSON record
-  internal   generate an internal identity JSON record
-  system     generate a system identity JSON record
-  associate  generate an associate identity JSON record
+  user             generate a user identity JSON record
+  internal         generate an internal identity JSON record
+  system           generate a system identity JSON record
+  associate        generate an associate identity JSON record
+  service-account  generate a service account identity JSON record
 
 FLAGS
-  -account-number ...          set the identity.account_number field (string)
-  -auth-type ...               set the identity.authtype field (string)
-  -employe-account-number ...  set the identity.employee_account_number field (string)
-  -org-id ...                  set the identity.org_id field (string)
-  -type ...                    set the identity.type field (string)
+  -account-number value          set the identity.account_number field (string)
+  -auth-type value               set the identity.authtype field (string)
+  -employe-account-number value  set the identity.employee_account_number field (string)
+  -org-id value                  set the identity.org_id field (string)
+  -type value                    set the identity.type field (string)
 ```
 
 ### Examples
 
 ```
 $ xrhidgen user -email [email protected]
-{"identity":{"account_number":"16349","auth_type":"cert","employee_account_number":"06900","internal":{"org_id":"51818"},"org_id":"51818","type":"User","user":{"email":"[email protected]","first_name":"Quinn","is_active":true,"is_internal":true,"is_org_admin":true,"last_name":"Runolfsdottir","locale":"se","user_id":"taps","username":"dunstable"}}}
+{"identity":{"org_id":"45841","internal":{"org_id":"45841"},"user":{"username":"backbencher","email":"[email protected]","first_name":"Cira","last_name":"Roob","is_active":false,"is_org_admin":true,"is_internal":false,"locale":"li","user_id":"nicole"},"system":{},"associate":{"Role":null,"email":"","givenName":"","rhatUUID":"","surname":""},"x509":{"subject_dn":"","issuer_dn":""},"service_account":{"client_id":"","username":""},"type":"User","auth_type":"cert-auth"},"entitlements":null}
 ```
 
 ```
 $ xrhidgen system | base64 -w0
-eyJpZGVudGl0eSI6eyJhY2NvdW50X251bWJlciI6IjQ0NDY4OCIsImVtcGxveWVlX2FjY291bnRfbnVtYmVyIjoiIiwib3JnX2lkIjoiODEzNTIiLCJzeXN0ZW0iOnsiY2VydF90eXBlIjoiIiwiY2x1c3Rlcl9pZCI6ImNjWWJhTllCIiwiY24iOiJhYzRlM2RmYy1kOGU3LTQwODUtYjg3YS0zMTcyZjU1M2I3M2UifSwidHlwZSI6IiJ9fQo=
+eyJpZGVudGl0eSI6eyJvcmdfaWQiOiIyMTcwMyIsImludGVybmFsIjp7Im9yZ19pZCI6IjIxNzAzIn0sInVzZXIiOnsidXNlcm5hbWUiOiIiLCJlbWFpbCI6IiIsImZpcnN0X25hbWUiOiIiLCJsYXN0X25hbWUiOiIiLCJpc19hY3RpdmUiOmZhbHNlLCJpc19vcmdfYWRtaW4iOmZhbHNlLCJpc19pbnRlcm5hbCI6ZmFsc2UsImxvY2FsZSI6IiIsInVzZXJfaWQiOiIifSwic3lzdGVtIjp7ImNuIjoiRyIsImNlcnRfdHlwZSI6ImNvbnN1bWVyIiwiY2x1c3Rlcl9pZCI6IkhKbyJ9LCJhc3NvY2lhdGUiOnsiUm9sZSI6bnVsbCwiZW1haWwiOiIiLCJnaXZlbk5hbWUiOiIiLCJyaGF0VVVJRCI6IiIsInN1cm5hbWUiOiIifSwieDUwOSI6eyJzdWJqZWN0X2RuIjoiIiwiaXNzdWVyX2RuIjoiIn0sInNlcnZpY2VfYWNjb3VudCI6eyJjbGllbnRfaWQiOiIiLCJ1c2VybmFtZSI6IiJ9LCJ0eXBlIjoiU3lzdGVtIiwiYXV0aF90eXBlIjoiYmFzaWMtYXV0aCJ9LCJlbnRpdGxlbWVudHMiOm51bGx9Cg==
 ```
 
 ```
@@ -60,7 +61,7 @@ used to initialize the generator to a deterministic state.
 
 ```
 $ SEED=100 xrhidgen user
-{"identity":{"auth_type":"basic","employee_account_number":"02299","internal":{"org_id":"41123"},"org_id":"41123","type":"User","user":{"email":"[email protected]","first_name":"Cameron","is_active":false,"is_internal":false,"is_org_admin":false,"last_name":"Stehr","locale":"fi","user_id":"meredeth","username":"skeptic"}}}
+{"identity":{"employee_account_number":"02299","org_id":"41123","internal":{"org_id":"41123"},"user":{"username":"skeptic","email":"[email protected]","first_name":"Cameron","last_name":"Stehr","is_active":false,"is_org_admin":false,"is_internal":false,"locale":"fi","user_id":"meredeth"},"system":{},"associate":{"Role":null,"email":"","givenName":"","rhatUUID":"","surname":""},"x509":{"subject_dn":"","issuer_dn":""},"service_account":{"client_id":"","username":""},"type":"User","auth_type":"basic-auth"},"entitlements":null}
 ```
 
 ## Go package