adding shared prefs to save the users name

app/src/main/java/com/mattintech/lchat/utils/PreferencesManager.kt

@@ -0,0 +1,36 @@
+package com.mattintech.lchat.utils
+
+import android.content.Context
+import android.content.SharedPreferences
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class PreferencesManager @Inject constructor(
+    @ApplicationContext private val context: Context
+) {
+    private val sharedPreferences: SharedPreferences = 
+        context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+
+    fun saveUserName(name: String) {
+        if (name.isBlank()) {
+            clearUserName()
+        } else {
+            sharedPreferences.edit().putString(KEY_USER_NAME, name).apply()
+        }
+    }
+
+    fun getUserName(): String? {
+        return sharedPreferences.getString(KEY_USER_NAME, null)
+    }
+
+    fun clearUserName() {
+        sharedPreferences.edit().remove(KEY_USER_NAME).apply()
+    }
+
+    companion object {
+        private const val PREFS_NAME = "lchat_preferences"
+        private const val KEY_USER_NAME = "user_name"
+    }
+}