obsessively good avocado cucumber salad

Name: obsessively good avocado cucumber salad
Cuisine: American
Ingredients: 3/4 to 1 pound seedless cucumber, washed and chopped into chunks; 2 thin or 1 regular scallions, thinly sliced; 1 large avocado, pitted and diced; 1 to 2 tablespoons mayonnaise; Juice of half a lime, plus more to taste; Salt and hot sauce (we used Sriracha) to taste; Chopped cilantro or flat-leaf parsley to garnish