@Override
            public void setTokens(Map<String, String> tokens) {
                tokens.entrySet().forEach((entry) -> setToken(entry.getKey(), entry.getValue()));
            }
Creates a new TokenFilter instance with token values set for all tokens
which are not specific to connections or connection groups. Currently,
this is only the vault-specific username token ("USERNAME"). Each token
stored within the returned TokenFilter via setToken() will be
automatically canonicalized for use within secret names.

@return
    A new TokenFilter instance with token values set for all tokens
    which are not specific to connections or connection groups.
extensions/guacamole-vault/modules/guacamole-vault-base/src/main/java/org/apache/guacamole/vault/user/VaultUserContext.java