added documentation on storing credentials (#61660)

Co-authored-by: Jagpreet Grewal <jsg25@sfu.ca>
Co-authored-by: Roshan Jossy <roshanjossey@gmail.com>

Contributors.md

@@ -1063,6 +1063,7 @@
 - [ctran](https://github.com/ctran414)
 - [Xeplon](https://github.com/Xeplon)
 - [koanuywg](https://github.com/koanuywg)
+- [Jagpreet Grewal](https://github.com/JagpreetGrewal)
 - [danesusername](https://github.com/danesusername)
 - [Rajat Bhosale](https://github.com/RajatBhosale)
 - [Charandeep Singh](https://github.com/charandeepsinghb)

additional-material/git_workflow_scenarios/additional-material.md

@@ -46,4 +46,7 @@ This document provides information about how to undo a commit on your local repo
 This document is dedicated to all the tips and tricks websites, blog posts, and helpful sites that make our lives easier. They are a great reference to serve all of our needs, be it a beginner or an expert. This page should act as an index of all those useful links that would help everybody who is new in the open-source domain or someone who wants to learn more.
 
 ### [Creating a .gitignore file](creating-a-gitignore-file.md)
-This document explains what a .gitignore file does, why to use it and how to create a .gitignore file. This file is used in almost all git projects. It helps commit only the necessary files to git.
+This document explains what a .gitignore file does, why to use it and how to create a .gitignore file. This file is used in almost all git projects. It helps commit only necessary files to git.
+
+### [Storing Credentials](storing-credentials.md)
+This document explains how to store your credentials for repositories. This can be a security concern, so please follow the security policies of your place of work/study.

additional-material/git_workflow_scenarios/storing-credentials.md

@@ -0,0 +1,48 @@
+# Storing Credentials
+
+You might have complained about this before - entering your username and password each time you access the repository can be a hassle and can interrupt your workflow if it takes too long. But it doesn't need to be that way.
+
+We will be covering one of the methods available to us - [git credential cache](https://git-scm.com/docs/git-credential-cache).
+
+**Note:** Please follow the security policies of your place of work/study.
+
+## Caching
+
+We can use git credential cache to store our username and password.
+
+**Attention:** This method saves the credentials in *plaintext* on your PC's disk. Everyone on your computer can access it, e.g. malicious NPM modules.
+
+### Global Credential Cache
+
+If we wish to, we can store the credentials for every repository we are working with using one simple command:
+
+```
+$ git config --global credential.helper cache
+```
+
+**Reminder:** Please follow the security policies of your place of work/study.
+
+### Repository Credential Cache
+
+We can store the credentials for the repository we are working with using one simple command, similar to before: 
+
+```
+$ git config credential.helper cache
+```
+
+**Reminder:** Please follow the security policies of your place of work/study.
+
+### Cache Timeout
+
+If we do not specify a length of time to store our credentials, they can potentially be stored forever. However, we can determine how long they will be kept in memory using this command:
+
+```
+git config credential.helper 'cache --timeout=<timeout>'
+```
+
+Using the helper, the credentials will never touch the disk and will be erased after the specified timeout. The default value is 900 seconds (15 minutes).
+
+#### References
+[Stack Overflow](https://stackoverflow.com/questions/35942754/how-can-i-save-username-and-password-in-git)
+
+### [Additional Material](additional-material.md)