Add support for account index.

src/app/_models/staff.ts

@@ -0,0 +1,2 @@
+export interface Staff {
+}

src/app/_models/token.ts

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+export interface Token {
+  name: string;
+  symbol: string;
+  address: string;
+  supply: string;
+  decimals: string;
+  reserves: {
+    '0xa686005CE37Dce7738436256982C3903f2E4ea8E'?: {
+      weight: string;
+      balance: string;
+    }
+  };
+  reserveRatio?: string;
+  owner?: string;
+}