add admin user logic

src/main/java/ru/soune/nocopy/adminpanel/exceptions/AdminUserNotFoundException.java

@@ -0,0 +1,7 @@
+package ru.soune.nocopy.adminpanel.exceptions;
+
+public class AdminUserNotFoundException extends RuntimeException {
+    public AdminUserNotFoundException(String message) {
+        super(message);
+    }
+}

src/main/java/ru/soune/nocopy/adminpanel/exceptions/EmailAlreadyExistsException.java

@@ -0,0 +1,7 @@
+package ru.soune.nocopy.adminpanel.exceptions;
+
+public class EmailAlreadyExistsException extends RuntimeException {
+    public EmailAlreadyExistsException(String message) {
+        super(message);
+    }
+}