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A Firebase Web Application

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This web application performs the following operations to the users’ profiles including IDs, names, and email addresses in a Firebase database:

• Add a user: Adding a user by entering a unique ID, a name, and an email address,
• Show a user: Showing the data of the user by entering an ID,
• Show all users: Showing the data of all users,
• Delete a user: Deleting a user by entering an ID,
• Delete the database: Deleting the whole database, and
• Update a user: Updating the data of a user by entering an ID. If the name or email address is empty, its value is not changed.

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Q: What do prisoners use to call each other?           A: Cell phones.