feat: added oauth based login and registration (#1)

Co-authored-by: Sharang Parnerkar <parnerkarsharang@gmail.com>
Reviewed-on: #1

src/models/mod.rs

@@ -0,0 +1,3 @@
+mod user;
+
+pub use user::*;

src/models/user.rs

@@ -0,0 +1,21 @@
+use serde::Deserialize;
+use serde::Serialize;
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct UserData {
+    pub name: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct LoggedInState {
+    pub access_token: String,
+    pub email: String,
+}
+
+impl LoggedInState {
+    pub fn new(access_token: String, email: String) -> Self {
+        Self {
+            access_token,
+            email,
+        }
+    }
+}