• Head over to the Supabase website and log in to your dashboard.
• Click on the "New Project" button to start a new project.
• Fill in the details like Project Name, Database Password, and Region.
• Hit "Create New Project" to get your Supabase project up and running.

• In your Supabase project, go to the "Table Editor".
• Click "New Table" to start creating a new table.
• Give your table a name and add the columns you need with the right data types.
• Click "Save" to create the table.

• Go back to the "Table Editor" and select the table you just created.
• Click "Insert Row" to start adding data to your table.
• Repeat this step to add as many rows as you need.
• Click "Save" to store the data.

• Navigate to the "SQL Editor" in your Supabase project.
• Click "New Query" to start a new SQL query.
• Write a SQL function based on what you need. Here's an example of a function that returns a list of users from the 'users' table:

CREATE OR REPLACE FUNCTION get_users()
RETURNS SETOF users AS $$
BEGIN
  RETURN QUERY SELECT * FROM users;
END;
$$ LANGUAGE plpgsql;

• Click "Run" to execute the query and create the function.

• Go to the "API" section in your Supabase dashboard.
• Find the "Functions" tab and locate the function you just created.
• Turn on the REST API endpoint by toggling it on.

• Note down the endpoint URL provided by Supabase (e.g., https://your_project_id.supabase.co/rest/v1/rpc/get_users).
• Use a tool like Postman or cURL to test the endpoint. Here's an example using cURL:

curl -X POST 'https://your_project_id.supabase.co/rest/v1/rpc/get_users' \
  -H "apikey: YOUR_SUPABASE_ANON_KEY" \
  -H "Content-Type: application/json"

• Check that the endpoint is returning the data you expect.

• Go to the "Authentication" section in your Supabase dashboard.
• Set up authentication rules and policies to secure your endpoint. Use Supabase's Row Level Security (RLS) and JWT tokens if needed.