diff --git a/src/domain/entities/generic/Either.ts b/src/domain/entities/generic/Either.ts
index ecca6888..adff2c62 100644
--- a/src/domain/entities/generic/Either.ts
+++ b/src/domain/entities/generic/Either.ts
@@ -17,11 +17,9 @@
 export class Either<Error, Data> {
     constructor(public value: EitherValue<Error, Data>) {}
 
-    getOrThrow(): Data | undefined {
-        if (this.isError()) {
-            throw this.value.error;
-        }
-        return this.value.data;
+    getOrThrow(): Data {
+        if (this.value.data) return this.value.data;
+        else throw this.value.error;
     }
 
     match<Res>(matchObj: MatchObject<Error, Data, Res>): Res {