Adding content to 102-graphql-over-sse

src/roadmaps/graphql/content/106-serving-over-internet/102-graphql-over-sse/100-authorization.md

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-# Authorization
+# Authorization
+
+Authorization in GraphQL refers to the process of controlling access to specific fields, types, or operations in a GraphQL schema based on user roles or permissions. It allows you to restrict access to certain data or functionality in your application based on the user's role or permissions.
+
+There are several ways to implement authorization in GraphQL:
+
+- Using middleware
+- Using schema directives
+- Using a data source layer
+
+To learn more, visit the following links:
+
+- [Get Started with Authorization](https://graphql.org/learn/authorization/)
+- [Authorization with GraphQL Shield](https://www.youtube.com/watch?v=DvjRCnrYFcg)

src/roadmaps/graphql/content/106-serving-over-internet/102-graphql-over-sse/index.md

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-# Graphql over sse
+# GraphQL Over SSE
+
+GraphQL over SSE (Server-Sent Events) is a way to use the Server-Sent Events (SSE) protocol to send real-time updates from the server to the client over a single HTTP connection.
+
+SSE is a simple and efficient protocol for sending real-time updates from the server to the client over a single HTTP connection. It's supported by most modern web browsers and it's easy to implement on the server side.
+
+To implement GraphQL over SSE, you can use a library such as graphql-sse which provides a way to send GraphQL updates over SSE. This library allows you to handle SSE connections and events, and to send and receive GraphQL updates over the SSE connection.
+
+To learn more, visit the following links:
+
+- [Overview of GraphQL over SSE (Server-Sent Events)](https://the-guild.dev/blog/graphql-over-sse)
+- [GraphQL Subscriptions with Server Sent Events](https://www.youtube.com/watch?v=oZtTut7QsZ8)