Manually add users to database, better handling of errors in API

Also manually remove users from database, and list them only as admin

src/graphql/mutation.rs

@@ -1,16 +1,52 @@
+use juniper::FieldResult;
+
+use crate::db::{models::users::User, DatabaseError};
+
 use super::Context;
 
 pub struct Mutation;
 
 #[juniper::graphql_object(Context = Context)]
 impl Mutation {
-    fn api_version(
-        context: &Context,
-    ) -> String {
+    fn api_version(context: &Context) -> String {
         if context.user_auth {
             "0.1 (authentified)"
         } else {
             "0.1 (not authentified)"
-        }.into()
+        }
+        .into()
+    }
+
+    pub fn db_only_new_user(
+        context: &Context,
+        username: String,
+        id: String,
+        admin_key: String,
+    ) -> FieldResult<User> {
+        if admin_key == context.other_vars.admin_key {
+            context
+                .db
+                .insert_user(username, id)
+                .map_err(std::convert::Into::into)
+        } else {
+            Err(DatabaseError::new("Invalid admin key", "Invalid admin key")
+                .into())
+        }
+    }
+
+    pub fn db_only_delete_user(
+        context: &Context,
+        id: String,
+        admin_key: String,
+    ) -> FieldResult<String> {
+        if admin_key == context.other_vars.admin_key {
+            match context.db.delete_user(&id) {
+                Ok(_) => Ok("done".into()),
+                Err(e) => Err(e.into()),
+            }
+        } else {
+            Err(DatabaseError::new("Invalid admin key", "Invalid admin key")
+                .into())
+        }
     }
 }