diff --git a/api-core/src/main/java/com/example/api/core/data/core/BaseApiRepository.kt b/api-core/src/main/java/com/example/api/core/data/core/BaseApiRepository.kt
index 4c92127..bbb520a 100644
--- a/api-core/src/main/java/com/example/api/core/data/core/BaseApiRepository.kt
+++ b/api-core/src/main/java/com/example/api/core/data/core/BaseApiRepository.kt
@@ -3,8 +3,8 @@ package com.example.api.core.data.core
 import com.example.api.core.domain.ApiRepository
 import com.example.api.core.domain.AuthUserResponse
 import com.example.api.core.domain.FetchResult
-import com.example.api.core.domain.RegisterUser
 import com.example.api.core.domain.Projects
+import com.example.api.core.domain.RegisterUser
 import retrofit2.HttpException
 import java.net.UnknownHostException
 
@@ -50,6 +50,12 @@ internal class BaseApiRepository(
         response.toUserResponse()
     }
 
+    override suspend fun signIn(registerUser: RegisterUser): FetchResult<AuthUserResponse> = handle.handle {
+        val response = service.auth(registerUser.toSignInUserDto())
+        dataStoreRepository.saveToken(response.token)
+        response.toUserResponse()
+    }
+
 
     override suspend fun projects(): FetchResult<Projects> = handle.handle {
         service.projects().toDomain()
diff --git a/api-core/src/main/java/com/example/api/core/domain/ApiRepository.kt b/api-core/src/main/java/com/example/api/core/domain/ApiRepository.kt
index dbd34c7..5d18032 100644
--- a/api-core/src/main/java/com/example/api/core/domain/ApiRepository.kt
+++ b/api-core/src/main/java/com/example/api/core/domain/ApiRepository.kt
@@ -9,5 +9,7 @@ interface ApiRepository {
 
     suspend fun auth(registerUser: RegisterUser): FetchResult<AuthUserResponse>
 
+    suspend fun signIn(registerUser: RegisterUser): FetchResult<AuthUserResponse>
+
     suspend fun projects(): FetchResult<Projects>
 }
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