Also check the token argument

Signed-off-by: hi-rustin <rustin.liu@gmail.com>

src/cargo/ops/registry.rs

@@ -764,14 +764,14 @@ pub fn registry_login(
                 .with_context(|| "failed to read stdin")?;
             // Automatically remove `cargo login` from an inputted token to
             // allow direct pastes from `registry.host()`/me.
-            line = line.replace("cargo login", "").trim().to_string();
-            if line.is_empty() {
-                bail!("please provide a non-empty token");
-            }
-            line
+            line.replace("cargo login", "").trim().to_string()
         }
     };
 
+    if token.is_empty() {
+        bail!("please provide a non-empty token");
+    }
+
     if let RegistryConfig::Token(old_token) = &reg_cfg {
         if old_token == &token {
             config.shell().status("Login", "already logged in")?;

tests/testsuite/login.rs

@@ -106,5 +106,15 @@ fn empty_login_token() {
 ",
         )
         .with_status(101)
-        .run()
+        .run();
+
+    cargo_process("login")
+        .arg("")
+        .with_stderr(
+            "\
+[ERROR] please provide a non-empty token
+",
+        )
+        .with_status(101)
+        .run();
 }