Fixes #4 Improve error reporting

src/ErrorMessage.ts

@@ -0,0 +1,33 @@
+import { GithubError } from "./GithubError"
+
+export class ErrorMessage {
+    error: any
+
+    constructor(error: any) {
+        this.error = error
+    }
+
+    toString(): string {
+        const message = this.error.message
+        const errors = this.githubErrors()
+        if (errors.length > 0) {
+            return `${message}\nErrors:\n${this.errorBulletedList(errors)}`
+        } else {
+            return message
+        }
+    }
+
+    githubErrors(): GithubError[] {
+        const errors = this.error.errors
+        if (errors instanceof Array) {
+            return errors.map((err) => new GithubError(err))
+        } else {
+            return []
+        }
+    }
+
+    errorBulletedList(errors: GithubError[]): string {
+        return errors.map((err) => `- ${err}`).join("\n")
+    }
+}
+