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You’ll be able to confirm various variables of PHP as well as receive the notifications, warnings and fatal errors on WordPress by using this plugin. 
Usually WordPress users have to turn on the “WP_DEBUG” setting for debugging, but edump will show the information without needing it to be turned on, so you can recognize various notifications, warnings and errors on your production stage of WordPress. You can resolve and detect some issues easily by using this plugin.
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https://www.edump.net/

edump

Debugging Plugin with edump for WordPress.

JS Morisset

The JSM Show User Metadata plugin displays user profile meta keys and unserialized values in a metabox at the bottom of the user profile editing page.
There are no plugin settings – simply install and activate the plugin.
<h4>Available Filters for Developers</h4>
Filter the user meta shown in the metabox:
<pre><code>'jsmsum_metabox_table_metadata' ( array $metadata, $user_obj )
</code></pre>
Array of regular expressions to exclude meta keys:
<pre><code>'jsmsum_metabox_table_exclude_keys' ( array $exclude_keys, $user_obj )
</code></pre>
Capability required to show user meta:
<pre><code>'jsmsum_show_metabox_capability' ( 'manage_options', $user_obj )
</code></pre>
Show user meta for a screen base (defaults to true):
<pre><code>'jsmsum_show_metabox_screen_base' ( true, $screen_base )
</code></pre>
Capability required to delete user meta:
<pre><code>'jsmsum_delete_meta_capability' ( 'manage_options', $user_obj )
</code></pre>
Icon for the delete user meta button:
<pre><code>'jsmsum_delete_meta_icon_class' ( 'dashicons dashicons-table-row-delete' )
</code></pre>
<h4>Related Plugins</h4>
<ul>
<li><a href="https://wordpress.org/plugins/jsm-show-comment-meta/" rel="ugc">JSM Show Comment Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-order-meta/" rel="ugc">JSM Show Order Metadata for WooCommerce HPOS</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-post-meta/" rel="ugc">JSM Show Post Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-term-meta/" rel="ugc">JSM Show Term Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-user-meta/" rel="ugc">JSM Show User Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-registered-shortcodes/" rel="ugc">JSM Show Registered Shortcodes</a></li>
</ul>

JSM Show User Metadata

throws now errors/warnings, good performance, just fulfills it's job. 5 stars

just works

Show user metadata in a metabox when editing users - a great tool for debugging issues with user metadata.

edump vs JSM Show User Metadata