[FEAT] 예외처리를 위한 of 메서드 구현

nonsoolmateServer/src/main/java/com/nonsoolmate/nonsoolmateServer/domain/member/entity/enums/PlatformType.java

@@ -1,5 +1,15 @@
 package com.nonsoolmate.nonsoolmateServer.domain.member.entity.enums;
 
+import static com.nonsoolmate.nonsoolmateServer.domain.auth.exception.AuthExceptionType.INVALID_PLATFORM_TYPE;
+
+import com.nonsoolmate.nonsoolmateServer.domain.auth.exception.AuthException;
+import java.util.Arrays;
+
 public enum PlatformType {
-    NAVER, NONE
+    NAVER, NONE;
+
+    public static PlatformType of(String platformType) {
+        return Arrays.stream(PlatformType.values()).filter(type -> type.equals(platformType)).findAny()
+                .orElseThrow(() -> new AuthException(INVALID_PLATFORM_TYPE));
+    }
 }