re-implemented JWT auth

app/server/graphql/schema.graphql

@@ -6,13 +6,9 @@ type Query {
 }
 
 type Mutation {
-  login(input: LoginInput!): Session!
   signUp(input: SignUpInput!): Void
-}
-
-input LoginInput {
-  email: String!
-  password: String!
+  login(input: LoginInput!): Session!
+  logout: Void
 }
 
 input SignUpInput {
@@ -21,16 +17,13 @@ input SignUpInput {
   password: String!
 }
 
-type Session {
-  accessToken: String!
+input LoginInput {
+  email: String!
+  password: String!
 }
 
-type RefreshToken {
-  token: String!
-  maxAge: Int!
-  secure: Boolean!
-  httpOnly: Boolean!
-  sameSite: String!
+type Session {
+  accessToken: String!
 }
 
 type Book {