feat(auth): implement user authentication system

backend/node_modules/pure-rand/lib/esm/distribution/UnsafeUniformBigIntDistribution.js

@@ -0,0 +1,24 @@
+var SBigInt = typeof BigInt !== 'undefined' ? BigInt : undefined;
+export function unsafeUniformBigIntDistribution(from, to, rng) {
+    var diff = to - from + SBigInt(1);
+    var MinRng = SBigInt(-0x80000000);
+    var NumValues = SBigInt(0x100000000);
+    var FinalNumValues = NumValues;
+    var NumIterations = 1;
+    while (FinalNumValues < diff) {
+        FinalNumValues *= NumValues;
+        ++NumIterations;
+    }
+    var MaxAcceptedRandom = FinalNumValues - (FinalNumValues % diff);
+    while (true) {
+        var value = SBigInt(0);
+        for (var num = 0; num !== NumIterations; ++num) {
+            var out = rng.unsafeNext();
+            value = NumValues * value + (SBigInt(out) - MinRng);
+        }
+        if (value < MaxAcceptedRandom) {
+            var inDiff = value % diff;
+            return inDiff + from;
+        }
+    }
+}