Resolve "Add get group by username endpoint"

Closes #243

See merge request idatt2106-v23-03/backend!182

Resolve "Add endpoint to get food waster of the last 4 months."

Closes #242

See merge request idatt2106-v23-03/backend!183

Group endpoints now use Authentication objects to handle usernames....

Closes #238

See merge request idatt2106-v23-03/backend!181

Group endpoints now use Authentication objects to handle usernames. groupAuthority endpoint allows changing group member authority

Sync to changes from main

Resolve "fix json ignore in none owner entites"

Closes #240

See merge request idatt2106-v23-03/backend!179

Resolve "Start with some of the algortihms to get statistic."

Closes #236

See merge request idatt2106-v23-03/backend!180

Resolve "fix add shoppinglist"

Closes #237

See merge request idatt2106-v23-03/backend!178

Wrong parameter name in shoppinglist delete by group ID endpoint

See merge request idatt2106-v23-03/backend!176

A temporal fix was added for add product endpoint

Closes #234

See merge request idatt2106-v23-03/backend!177

Changed parameter name for endpoint to better reflect that the parameter is a group ID

See merge request idatt2106-v23-03/backend!175

JSON serialization of shoppinglist has been fixed

Closes #228

See merge request idatt2106-v23-03/backend!174

Resolve "Fix error 500 from  /api/fridges/waste/product/116"

Closes #234

See merge request idatt2106-v23-03/backend!173

Group creation now takes care of unmarking old primary group

Closes #229

See merge request idatt2106-v23-03/backend!172

Improved response layout for group get endpoint

Closes #211

See merge request idatt2106-v23-03/backend!171

Resolve "Add endpoint to fetch products by keyword name"

Closes #225

See merge request idatt2106-v23-03/backend!170

Bugfix/fridge controller delete amount

Closes #224

See merge request idatt2106-v23-03/backend!169

Sync to changes from main

Resolve "Group shoppinglist fridge associations"

Closes #216

See merge request idatt2106-v23-03/backend!166

Amount attribute in manyToMany table between fridge and product was changed from int to double

Closes #221

See merge request idatt2106-v23-03/backend!165