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<h3>Summary by Bito</h3>
This PR implements critical improvements including proper toString methods in Book class, HTTP request data extraction in User class, and resource cl...
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<div id="issue"><b>Possible undefined variable usage in session</b></div>
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The variable `item` appears to be undefined. Should this be `items` instead?...
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<div id="issue"><b>Missing method name in interface definition</b></div>
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The method signature appears to be incomplete - missing method name `logout`....
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<div id="issue"><b>Connection method returns null value</b></div>
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The `getConnection()` method is returning `null` which could lead to `NullPointerExc...
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<div id="issue"><b>Incomplete field declaration needs field name</b></div>
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The field declaration appears to be incomplete. The field name is missing a...
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<div id="issue"><b>Consider renaming password-related database column constant</b></div>
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Consider using a less obvious name for password-related datab...
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<div id="issue"><b>Consider fixing variable name typo</b></div>
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There appears to be a typo in the variable name. The code uses `item` instead of `item...
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<div id="issue"><b>Add phone number validation check</b></div>
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Consider adding validation for the phone number string before parsing to avoid potentia...
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<div id="issue"><b>Incorrect variable name capitalization</b></div>
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The variable name `Quantity` appears to have incorrect capitalization. It should b...
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<div id="issue"><b>Missing parameter type in constructor</b></div>
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The constructor parameter type is missing for `quantity`. Consider adding `int` as ...
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<div id="issue"><b>Consider using try-with-resources for Connection</b></div>
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The database connection is not being closed after use. Consider using tr...