GENEVA, June 9 (Reuters) – Several candidates running ⁠to ⁠be the next head of ⁠the United Nations called for a strengthening of human rights and respect for ​international law and bolstering the organisation through reforms during a debate in Geneva on Tuesday. Four of the five ‌candidates to succeed Secretary-General Antonio Guterres, ‌who completes his second five-year term at the end of this year, laid out their visions ⁠for the ⁠role at a time when the U.N. faces a severe financial crisis ​triggered by cuts from major humanitarian donors. The organisation is also contending with $4 billion in unpaid U.S. arrears, multiplying conflicts, and widespread violations of international law. Maria Fernanda Espinosa, a former foreign affairs minister and defence minister in Ecuador, said ​the crisis required an energetic leader.  “This moment calls for a renaissance Secretary-General, a Secretary-General capable of ⁠restoring ⁠the U.N.’s moral authority,” she ⁠said, proposing establishing ​an early action hub to address conflicts as they emerge. ERODING TRUST IN INTERNATIONAL ORGANISATIONS  Rebeca Grynspan, a ​former vice president of ⁠Costa Rica who described herself …