Added equals and hashcode override for Member entity

src/main/kotlin/uk/co/neviyn/booru/Entity.kt

@@ -41,7 +41,22 @@ open class Member(
     @SequenceGenerator(name="member_id_seq", sequenceName = "member_id_seq", allocationSize = 1)
     @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "member_id_seq")
     open var id: Long = -1
-)
+) {
+    override fun equals(other: Any?): Boolean {
+        if(other === this) return true
+        return if(other is Member){
+            other.id == id
+        } else false
+    }
+
+    override fun hashCode(): Int {
+        var result = name.hashCode()
+        result = 31 * result + email.hashCode()
+        result = 31 * result + password.hashCode()
+        result = 31 * result + id.hashCode()
+        return result
+    }
+}
 
 @Entity
 open class Role(