add user model

android/app/src/main/java/com/chatman/model/User.java

 package com.chatman.model;
 
 public class User {
+    private String key;
+    private String name;
+    private String email;
+    private String password;
+
+
+    public User() {
+    }
+
+    public User(String key, String name, String email, String password) {
+        this.key = key;
+        this.name = name;
+        this.email = email;
+        this.password = password;
+    }
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
 }