auth/service/proto: add Delete RPC (#1836)

Co-authored-by: Asim Aslam <asim@aslam.me>

auth/service/proto/auth.proto

@@ -10,6 +10,7 @@ service Auth {
 
 service Accounts {
 	rpc List(ListAccountsRequest) returns (ListAccountsResponse) {};
+	rpc Delete(DeleteAccountRequest) returns (DeleteAccountResponse) {};
 }
 
 service Rules {
@@ -26,6 +27,13 @@ message ListAccountsResponse {
 	repeated Account accounts = 1;
 }
 
+message DeleteAccountRequest {
+	string id = 1;
+	Options options = 2;
+}
+
+message DeleteAccountResponse {}
+
 message Token {
 	string access_token = 1;
 	string refresh_token = 2;