use false instead of null as null is interpreted as 0

Author: zefir-git

src/main/java/pro/cloudnode/smp/bankaccounts/BankConfig.java

@@ -132,7 +132,7 @@ public boolean integrationsVaultEnabled() {
 
     // starting-balance
     public @NotNull Optional<@NotNull BigDecimal> startingBalance() {
-        if (Objects.requireNonNull(config.getString("starting-balance")).equalsIgnoreCase("null"))
+        if (Objects.requireNonNull(config.getString("starting-balance")).equalsIgnoreCase("false"))
             return Optional.empty();
         else return Optional.of(new BigDecimal(Objects.requireNonNull(config.getString("starting-balance"))));
     }

src/main/resources/config.yml

@@ -52,9 +52,9 @@ currency:
     format: "#,##0.00"
 
 # Starting balance
-# Min value is 0. Set to `null` to disable creating an account on join.
+# Min value is 0. Set to false to disable creating an account on join.
 # If the Vault integration is enabled and this is set to `null`, an account with 0 balance will be created regardless.
-starting-balance: 0
+starting-balance: false
 
 # Server account
 server-account: