(fix): reintroduce ApiError.java (#48)

Author: dsinghvi

src/main/java/com/merge/api/core/ApiError.java

@@ -0,0 +1,28 @@
+/**
+ * This file was auto-generated by Fern from our API Definition.
+ */
+package com.merge.api.core;
+
+public final class ApiError extends RuntimeException {
+    private final int statusCode;
+
+    private final Object body;
+
+    public ApiError(int statusCode, Object body) {
+        this.statusCode = statusCode;
+        this.body = body;
+    }
+
+    public int statusCode() {
+        return this.statusCode;
+    }
+
+    public Object body() {
+        return this.body;
+    }
+
+    @java.lang.Override
+    public String toString() {
+        return "ApiError{" + "statusCode: " + statusCode + ", body: " + body + "}";
+    }
+}