Added Unit Tests to Project

[kpwags]

Added Unit Tests for the following:

Admin

• Add Category
• Edit Category
• Delete Category
• Add Meat
• Edit Meat
• Delete Meat
• Add Invitation Code
• Edit Invitation Code
• Delete Invitation Code
• Toggle User Admin
• Delete User

Users

• Change Password
• Edit Profile
• Login
• Send Password Reset
• Reset Password
• Auth Gateway
• Signup

Recipes

• Add Recipe
• Edit Recipe
• Delete Recipe
• List Recipes by Category
• List Recipes by Meat
• List Recipes by User