diff --git a/Cargo.lock b/Cargo.lock
index 341329b..30e9f55 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -167,17 +167,6 @@ dependencies = [
  "rand",
 ]
 
-[[package]]
-name = "auth"
-version = "0.1.0"
-dependencies = [
- "error-stack",
- "futures-executor",
- "reqwest",
- "rs-firebase-admin-sdk",
- "tracing",
-]
-
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -2497,10 +2486,13 @@ dependencies = [
 name = "service"
 version = "0.1.0"
 dependencies = [
- "auth",
  "chrono",
  "domain",
+ "error-stack",
+ "futures-executor",
  "library",
+ "reqwest",
+ "rs-firebase-admin-sdk",
  "sea-orm",
  "tracing",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index e977d39..b22f3c4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [workspace]
-members = [".", "api", "auth", "domain","library", "service"]
+members = [".", "api", "domain","library", "service"]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/auth/Cargo.toml b/auth/Cargo.toml
deleted file mode 100644
index 9c0bcf1..0000000
--- a/auth/Cargo.toml
+++ /dev/null
@@ -1,13 +0,0 @@
-[package]
-name = "auth"
-version = "0.1.0"
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-rs-firebase-admin-sdk = "2.0.0"
-reqwest = "0.12.4"
-futures-executor = "0.3.30"
-error-stack = "0.4.1"
-tracing = "0.1.40"
diff --git a/auth/src/lib.rs b/auth/src/lib.rs
deleted file mode 100644
index a36c594..0000000
--- a/auth/src/lib.rs
+++ /dev/null
@@ -1 +0,0 @@
-pub mod firebase_admin;
\ No newline at end of file
diff --git a/service/Cargo.toml b/service/Cargo.toml
index d477353..01fe772 100644
--- a/service/Cargo.toml
+++ b/service/Cargo.toml
@@ -9,7 +9,10 @@ edition = "2021"
 tracing = "0.1.40"
 chrono = "0.4.35"
 sea-orm = { version = "0.12.14", features = ["sqlx-mysql", "runtime-tokio-rustls", "macros", "debug-print"] }
+rs-firebase-admin-sdk = "2.0.0"
+reqwest = "0.12.4"
+futures-executor = "0.3.30"
+error-stack = "0.4.1"
 
 library = { path = "../library" }
-domain = { path = "../domain" }
-auth = { path = "../auth" }
\ No newline at end of file
+domain = { path = "../domain" }
\ No newline at end of file
diff --git a/auth/src/firebase_admin.rs b/service/src/firebase_admin.rs
similarity index 100%
rename from auth/src/firebase_admin.rs
rename to service/src/firebase_admin.rs
diff --git a/service/src/lib.rs b/service/src/lib.rs
index 0ff037a..8215c76 100644
--- a/service/src/lib.rs
+++ b/service/src/lib.rs
@@ -1,2 +1,3 @@
 pub mod player_info;
 pub mod feedback;
+pub mod firebase_admin;
diff --git a/service/src/player_info.rs b/service/src/player_info.rs
index 731d6bd..e2f8bf6 100644
--- a/service/src/player_info.rs
+++ b/service/src/player_info.rs
@@ -5,7 +5,7 @@ use library::db;
 use library::resp::response::ResErr::{ErrPerm, ErrSystem};
 use library::resp::response::{ResOK, ResResult};
 use sea_orm::{ColumnTrait, EntityTrait, PaginatorTrait, QueryFilter, Set};
-use auth::firebase_admin;
+use crate::firebase_admin;
 
 pub async fn register(req: PlayerInfoRegister) -> ResResult<ResOK<()>> {
     match PlayerInfo::find()