wpdb->update not working with custom table

I have created custom table in WordPress database and I also created edit form to update the values. Here is my code

How to remove value of the class in an existing code (wordpress)?

I need to remove ‘mylogin’ that is inside the class. I tried the folloing code but it doesn’t remove ‘mylogin’. Would you please let me know how to remove it? Existing code:

Pass php variable into WordPress Query function

I would like to use ACF to store a variable which I then use in a wc_enqueue_js tag. If the variable is available via php as $couponCheck, I need to make it available as an array inside the ‘…