20 We are therefore Christ’s ambassadors, as though God were making his appeal through us. We implore you on Christ’s behalf: Be reconciled to God.

Read 2 Corinthians 5:20 Using Other Translations

Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God.
Therefore, we are ambassadors for Christ, God making his appeal through us. We implore you on behalf of Christ, be reconciled to God.
So we are Christ’s ambassadors; God is making his appeal through us. We speak for Christ when we plead, “Come back to God!”